Contents 



The influence of growth substances upon sulphydryl compounds. 



A. C. Leopold and C. A. Price {Purdue) . . . . 271 



Salt accumulation and mode of action of auxin. A preliminary 



hypothesis. T. A. Bennet-Clark {London) . . . 284 



IV. APPLICATIONS OF KINETICS TO AUXIN-INDUCED 

 GROWTH 



The kinetics of auxin-induced growth. J. Bonner and R. J. Foster 



{Pasadena) 295 



The kinetics of auxin-induced growth. T. A. Bennet-Clark 



{London) 310 



IX 



